Ravj,
Not entirely, but straight answer is yes, to be quick-n-easy I did not take it further. Its quite difficult to only rotoscope sections without doing a matte (see below) The better more expensive editors on the market have smart plug-ins I believe, to allow more control.
I took a video shot against a blue background and I then did a Color Painting effect and a Pencil Sketch effect on the timeline. This created a ratty-haired and increased folds-in-clothing image of me talking. I then produced the movie and re-processed the result a second time for brightness and hue and I think I did the color painting effect again on the second movie.
Then I moved it to timeline 2 and put a static image on timeline 1 of a valley - the default library image in PD9. I did a chroma-key of white so the background valley came through, but unfortunately my white beard and left face also got unwanted bleed-thru. Finally I placed the green text where you see it.
I have seen an excellent rotoscope on YouTube somehwere where the players in the movie, a young girl and her father are holding a hand mirror. I assume the mirror was the green screen item and they passed the mirror back and forth between them, covering their faces . In doing so the video-maker did a color rotoscope of the original faces in bizzare colors but only the mirror portion was visible, everything else was normal. The result was remarkable.
In making the hand-mirror be a matte, the artist confined his bleed-thru to just the mirror. If for example you were to cover a guitar body with green paper or wore green clothing you could do a similar movie.
See here
http://www.youtube.com/watch?v=BQk-HDW4diU
for my matte of a castle
If you can't solve the problem - Change the problem